I used to do the flower show here. I used 2 L soda bottles that fit perfectly into waste styrofoam packing from work. The styrofoam block originally held 6-2.5 L glass acid bottles so there was some space between each. I used a bit of tissue at the top to hold stems in place.
For thicker stems I cut the plastic soda bottles down a bit at the top to make a wider opening. Our show was in late May so no lilies then but lots of bearded irises that can have thick stems that would not otherwise fit in the bottles.
Sexy (and Saucy) are in the eye of the beholder. The lack of beer diminishes the concept a bit...
